#include <cstdlib>
#include <iostream>

int main() {
    // 使用curl命令下载更新信息文件
    std::string ftp_url = "ftp://example.com/update/version.txt";
    std::string username = "user";
    std::string password = "pass";
    std::string command = "curl -u " + username + ":" + password + " " + ftp_url + " -o version.txt";
    
    int result = std::system(command.c_str());
    if (result == 0) 
    {
        std::cout << "更新信息下载成功" << std::endl;
        // 解析version.txt判断是否需要更新
    } 
    else 
    {
        std::cout << "下载失败" << std::endl;
    }
    return 0;
}